Incorrect signalling path definitions

When the operator IPLs a system into a multisystem sysplex, XCF on each of the systems in the sysplex checks the signalling path definitions in its COUPLExx parmlib member.

If one of the following reasons are found, XCF on the initializing system or on an existing system issues message IXC451I. The reasons detected by XCF on an existing system are:

NOT SAME SYSPLEX: A signalling path on the initializing system is connected to a signalling path on this (an existing) system that is not using the same sysplex name as the initializing system. All paths must connect systems within the same sysplex.
COUPLING DATASETS DIFFER: A signalling path on the initializing system is connected to a signalling path on this (an existing) system that is not using the same sysplex couple data set as the initializing system. All paths must connect systems that use the same couple data set.

The reason detected by XCF on the initializing system is:

CIRCULAR PATH: An outbound signalling path on the initializing system is connected to an inbound signalling path that is also on the initializing system. This is not allowed.

Also message IXC458I might indicate the device address of a signalling path that has been stopped or has failed.